WendelLana commented on issue #1004: URL: https://github.com/apache/age/issues/1004#issuecomment-1694720029
@rafsun42 Based on the queries that I provided, openCypher supports all of them except for the label expression using `&`. Both Neo4j and openCypher don't allow multiple labels in edges, but we can use them in MATCH clauses and expressions, for example: ``` MATCH ()-[:ACTED_IN|:DIRECTED]->(:Movie) ``` So, openCypher supports label expressions using the PIPES symbol, denoted as `|`. However, Neo4j supports label expression with an extended set of logical operators and also relationship type expressions. Some examples: **Nested expression** Find all nodes that either have both labels `A` and `B`, or have label `C` ``` MATCH (n:(A&B)|C)-[]->(m) ``` **NOT expression** Find all nodes that do not contain the `A` label ``` MATCH (n:!A) ``` **Wildcard expression** Find all the nodes that contain at least one label ``` MATCH (n:%) ``` **References**: [Cypher Query Language Reference](https://github.com/opencypher/openCypher/blob/master/docs/openCypher9.pdf) [Neo4j Label Expressions](https://neo4j.com/docs/cypher-manual/current/syntax/expressions/#label-expressions) [Neo4j Relationship Type Expressions](https://neo4j.com/docs/cypher-manual/current/syntax/expressions/#relationship-type-expressions) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@age.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
